One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(9,10)(11,15)(12,14)(13,16)(17,18)(19,23)(20,24)(21,22)(25,26,30,31)(27,29,28,32)(2,3)(4,8)(9,10,12,14)(11,15,16,13)(17,18,21,22)(19,23,24,20)(26,31)(29,32)(4,8)(6,7)(11,16)(13,15)(18,22)(20,23)(25,27,30,28)(26,32,31,29)(1,3,5,2)(4,6,8,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,23)(20,22)(21,24)(25,28,30,27)(26,29,31,32)(1,4,5,8)(2,6,3,7)(9,11,12,16)(10,13,14,15)(17,20,21,23)(18,24,22,19)(25,29)(26,28)(27,31)(30,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.